You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Phillips.

ASSISTANT: How can I assist you?

USER: I want to book a ticket from DFW to BOS to attend seminar, can you help me in booking?

ASSISTANT: Ok, may I know your travelling dates?

USER: I am departing on 05/08 and return on 05/10.

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.