You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, In what way can I assist you now?

USER: I need to travel from PHX to HOU, can you help me in doing that?

ASSISTANT: Sure, please share me your trip dates.

USER: My journey dates are Dec 10 to 12.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT:  If you can help me with your name, I can begin looking up for the availability of flights.

USER: I am David Taylor.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: No, please go ahead further.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for connecting with us.