You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight in Big Brand Airlines to reach Houston?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Sure, my planned dates are on Feb 4th to 6th.

ASSISTANT: May I know your airport codes?

USER: My airport codes are PHL - IAH.

ASSISTANT: Do you require any stopovers in your journey?

USER: I prefer a connected flight.

ASSISTANT: Would you let us know if you have any other preferences?

USER: Make sure that I would like to depart in evening time.

ASSISTANT: Please share your name.

USER: Sure, my name is Joshua Martinez.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: No issues, thank you.

ASSISTANT: Thanks for reaching us.