You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Please tell me, how may I help you?

USER: I would like to book a ticket from DCA to PHX, can you help me?

ASSISTANT: Sure, on which dates you are planned to travel?

USER: My planned dates are 07/09 and 07/11.

ASSISTANT: Can you help me with your name?

USER: Debra Hill here.

ASSISTANT: Thank you for your details.

USER: Welcome.

ASSISTANT: Sorry, there is no flight with your dates.

USER: No problem, I will try for another way to complete my trip.

ASSISTANT: Ok, thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: Welcome.