You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to attend an interview at Dallas. Can you help me in booking a ticket from BOS to DFW?

ASSISTANT: Ok, may I know your travelling dates?

USER: My planned journey dates are 10/24 and 10/26.

ASSISTANT: Ok, please wait.

USER: Ok, take your time.

ASSISTANT: Sorry, no flight flights found on your preferable dates. May I know your name?

USER: It's ok, my name is Patricia Edwards. Thank you for the information.

ASSISTANT: Most welcome.