You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to book a flight ticket from PHX to IAH, can you help me in booking a flight ticket?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: Sure, my journey dates are Nov 19 and Nov 21.

ASSISTANT: Do you have any other preferences?

USER: I would prefer depart time at evening.

ASSISTANT: Give me a moment.

USER: Sure. I prefer maximum one connection.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: Ok, no issues.

ASSISTANT: Can I know your name?

USER: Thank you.

ASSISTANT: Thank you for contacting us.

USER: Sure, Sarah Edwards here.