You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: On the name of Raymond Taylor, book a ticket from DFW to write the exams.

ASSISTANT: Yes, Can you share me your travelling dates?

USER: I would like to fly on 08/20 and returns on 08/22.

ASSISTANT: Ok, can I know your destination airport code?

USER: Destination is Boston, BOS.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Fine, thank you for your quick response.

ASSISTANT: Thank you for contacting us.