You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Andrew Lee.

ASSISTANT: Yes Lee, how can I assist you today?

USER: I am an astronaut, I had an invitation to attend Space Center Houston. Could you please help me in booking my ticket?

ASSISTANT: Sure Lee, it is my job to assist you.

USER: Happy to hear that from you.

ASSISTANT: Lee, may I know when are you planning your journey?

USER: I prefer to travel from 08/16 and reach the destination on 08/18.

ASSISTANT: Ok Lee, it will be very helpful if you provide me your journey codes.

USER: I have planned my source code as MCO and my destination code would be IAH. Please ensure that it has 1 connecting flight.

ASSISTANT: Thank you Lee for providing your journey information. Can you please wait for a moment, while I check?

USER: Sure, take your own time.

ASSISTANT: I regret to inform you that there is no flight available on your preferred dates.

USER: Oh! That's sad to hear. No problem, I will choose other option to travel.

ASSISTANT: Lee, is there anything else that I can do for you?

USER: I'ts ok. Thank's for your concern.

ASSISTANT: Thank you Lee for selecting our agency. I will look forward for assisting you.

USER: It's my pleasure to choose you.