You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jessica Nelson here.

ASSISTANT: How can I assist you today?

USER:  I am a doctor, I have to attend a seminar on cerebral palsy. Could you book my flight ticket from AUS to MSP?

ASSISTANT: Ok, I will glad to help you. May I know your travelling dates please?

USER: Sure, I would like to travel on 09/01 and back on 09/03.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to say there are no flights are available on your desired dates.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for choosing our agency.