You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Richard Gonzalez from Atlanta. I have to go to Houston next month, can you please book a flight ticket for me?

ASSISTANT: Ok, I am glad to help you.

USER: Thank you.

ASSISTANT: Can you please provide your planned dates of travelling?

USER: I want to take off on 01/28 and book my return ticket also on 01/30.

ASSISTANT: Ok, may I know your nearest genesis and destination airport codes for booking?

USER: I would like to fly from ATL and destination airport is IAH.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with planned dates of travelling.

USER: Oh! It's ok no problem, I will go with another airline. Thank you for your service.

ASSISTANT: Thank you for reaching us, have a great day.