You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be your helping hand?

USER: Me and my friend are planning to visit Houston Hop-on Hop-off city tour at Houston HOU. Can you help me with booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 05/28 and 05/30.

ASSISTANT: Let me know your good name.

USER: I am Laura Scott.

ASSISTANT: Kindly share your source code.

USER: My starting point is Detroit DTW.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: There is no flight found matching with your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for availing us.