You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Brenda Carter. Can you please help me to book a ticket with the fare of 1000?

ASSISTANT: Sure,let me know your travelling dates?

USER: I have planned to travel on 10/04 and 10/06.

ASSISTANT: Please provide your airport codes.

USER: My airport codes are from BOS to SFO.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there were no flights available based on your details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.