You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I aid you today?

USER: As I was a scientist, I want to visit NASA space center in Houston, can you help me to book a connecting flight?

ASSISTANT: Sure, can I know your price limit?

USER: I can afford up to 5000.

ASSISTANT: Ok, on which dates would you like to travel?

USER: I am comfortable to travel on 12/21 and 12/23.

ASSISTANT: Can you please provide your near by airport codes?

USER: My boarding is at Washington, DC - DCA. My landing is at TX - IAH.

ASSISTANT: Ok, please for some time.

USER: Ok.

ASSISTANT: Thank you for your time. we found a 1006 southwest airline provides services in your travelling route. Shall I proceed with booking?

USER: I am comfortable with this airline.

ASSISTANT: To proceed further with booking we need your good name?

USER: Sure, I am Emily Anderson. Thanks for making me happy with your service.

ASSISTANT: Your ticket has been confirmed with Emily Anderson.

USER: Thank you.

ASSISTANT: Thank you for choosing us.