You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Brenda Garcia. I want to travel from LGA to HOU. Please help me.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are from 10/16 to 10/18.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, there are no flights available for your desired dates.

USER: That's fine, thank you.

ASSISTANT: Thank you for waiting.

USER: Most welcome.