You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can we best assist you?

USER: I need a flight ticket from Houston TX-IAH to visit  San Francisco zoo with my family.

ASSISTANT: Sure, may I know your journey dates?

USER: I would like to travel on 05/25 and return on 05/27.

ASSISTANT: What is your destination airport code?

USER: CA-SFO.

ASSISTANT: To proceed further, may I know your good name.

USER: Barbara Garcia.

ASSISTANT: Thanks for providing our name. Sorry there is no flight found on your journey details.

USER: Ok, thank you.

ASSISTANT: Thanks for connecting us, have a nice day.