You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how can I assist you for today?

USER: Am I speaking to flight travelling agency?

ASSISTANT: Yes, I am the one who used to book a flight tickets and also some more services like change and cancelling your flight ticket.

USER: That's nice, I think my problem can be solved in quick manner with your help.

ASSISTANT: Yes, I will definitely try to solve your problem. Which type of problem that you are willing to solve from our agency?

USER: Ok, I am a neurologist and I have to travel to Houston to do some research on brain that I have to do a brain surgeory in my hospital, so can you book a flight ticket for me?

ASSISTANT: Sure, I will book it for you. In order to book you a flight ticket I want some of the details about your journey.

USER: Which type of details that you need from my side for booking a flight ticket?

ASSISTANT: I want to know your nearest airport location points of boarding and takeoff can you please provide me?

USER: My hospital is in San Francisco which is nearest to CA-SFO where I want to board and the research centre is in Houston which is near to TX-IAH region where I want to land.

ASSISTANT: Ok, noted if you can provide your planned dates of journey so that I can find you a best flight for your journey?

USER: The brain surgery is on March 3rd, so I would like to travel on 02/28 to IAH and return back after research on 03/01.

ASSISTANT: Please, provide your name for booking you a flight ticket.

USER: Sure, my name is Eric Lewis and you can call me as Lewis.

ASSISTANT: Ok, noted. Please, wait for a moment to check the perfect flight for your journey.

USER: Yes, please check that I am looking for a flight with 1 land in another airport that it is a long trip so I have to take some rest in my between my journey.

ASSISTANT: Sorry to say this Lewis, I have try my best to find a flight for your journey but there is no flight route to your destination limit.

USER: It's very sad for me to hear  but it is an emergency case, so I will go with another source to reach my destination point.

ASSISTANT: Ok, Lewis sorry for the trouble. Hope I can serve you better next time.

USER: Ok, that's fine. Thank you for your great service in helping.

ASSISTANT: It's my duty, thank you for employing our service. Hope you have a great day ahead Lewis.

USER: Most welcome.