You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I support you today?

USER: I was invited as a chief guest in NASA Space centre to give speech. So, please book a flight to Houston, IAH.

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Can you please provide your take off airport code?

USER: Sure, I will fly from Minneapolis, MSP.

ASSISTANT:  Ok, Is there any restriction for price?

USER: Yes. I can bare an amount of 200 only.

ASSISTANT: What are your planned trip dates?

USER: I planned to start on 11/24 to 11/26.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Ok, Thank you.

ASSISTANT: May I know your name for the documentation purpose?

USER: I am Pamela Taylor.

ASSISTANT: Thank you for reaching us.