You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Andrew Collins.

ASSISTANT: How can I aid you today?

USER: I have a business meeting in Dallas. Can you help me for booking a flight ticket from PHX to DFW?

ASSISTANT: Sure, I am here to help you in booking. Please share your travelling dates also.

USER: My travelling dates are 09/12 and 09/14.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights are available on your journey dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.