You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Nancy Moore.

ASSISTANT: How may I aid you?

USER:  My convocation is going to held in Austin, can you help me in booking a ticket from DTW to AUS?

ASSISTANT: Ok, may I know your preferable dates of your journey?

USER: I would like to travel on 04/30 and return on 05/02.

ASSISTANT: Nancy, no flights has been found on your journey dates.

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

ASSISTANT: Thank you for reaching us.