You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: As I am a scientist, I would like to visit the NASA space centre, which is located at Houston, TX - HOU. Can you help me to book a connected airline with the name of Alexander Baker?

ASSISTANT: Sure, May I know the source code?

USER: I intend to travel from Seattle, WA - SEA.

ASSISTANT: Please help me with your travel dates.

USER: My preferable dates are on 04/16 and ends at 04/18.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, Not a problem now. Thank you for the quick response.

ASSISTANT: Thank you.