You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER:  As I am a scientist, I would like to visit the ancient 1940 air terminal museum, located at Houston. Can you please help me in booking?

ASSISTANT: Sure, please provide me your journey dates.

USER: My journey dates are from 04/13 to 04/15.

ASSISTANT: May I know your travel airport codes?

USER: My airport codes are from DCA to HOU.

ASSISTANT: May I know your name to proceed further?

USER: I am Karen Thompson.

ASSISTANT: Sorry, I could not find any flight with your travel dates.

USER: Ok, thank you.

ASSISTANT: It's my pleasure, have a safe journey.