You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am Deborah Wright. I would like to attend 8th International Colloids Conference in Detroit, DTW. Can you please book a flight ticket under the fare of 1000?

ASSISTANT: Sure, we would be happy to help you.

USER: Thank you.

ASSISTANT: May I know when are you planning to travel?

USER: My journey dates are, depart on 09/17 and return on 09/19.

ASSISTANT: Ok, from which airport you would like to take off?

USER: My boarding point is Phoenix, PHX.

ASSISTANT: Please wait for sometime, I will check the availability of flights and let you know.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight available on your given dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.