You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am William Gonzalez.

ASSISTANT: On what purpose, did you contact us?

USER: As a scientist, I would like to visit NASA Space Center at Houston, TX - HOU.

ASSISTANT: Ok.

USER: Will you help me to book a connecting flight?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Where do you board from?

USER: I would like to board from Houston, TX - IAH.

ASSISTANT: Ok, When will you travel and return?

USER: I wish to travel on 02/04 and intend to return on 02/06.

ASSISTANT: Please wait, Let me search you the flight.

USER: Sure.

ASSISTANT: Thanks for waiting. We found a Direct flight which does not matches your needs. Shall I proceed for that?

USER: Do not proceed.

ASSISTANT: Ok, Thanks for visiting us.

USER: Thank you.