You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Karen Garcia. I want to book a flight ticket to meet my uncle in Houston, could you help me in booking a flight ticket?

ASSISTANT: Sure, please help me with your travelling dates?

USER: My departure is 06/07 and return on 06/09.

ASSISTANT: Ok, let me know your airport codes?

USER: My source is Dallas, TX - DFW and destination is TX - IAH.

ASSISTANT: Ok, any other requirements?

USER: I need a connecting flight. My price limit is 500.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.