You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: I am Jason Nelson. Can you help me in booking my flight ticket from IAH to PHX?

ASSISTANT: Sure, can you please forward your preferred journey dates?

USER: My trip dates will be Aug 16th to Aug 18th.

ASSISTANT: Do you have any class preference?

USER: I am ok, with any class.

ASSISTANT: Please mention your connection limit.

USER: I need a single connecting flight.

ASSISTANT: Is there any more requirements?

USER: My return time should be in the evening.

ASSISTANT: Ok, please be on hold.

USER: Sure.

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

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing us.