You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Christine Campbell here. I am facing a network issue that why I am unable to book my ticket from BOS to SFO. Please can you do this for me?

ASSISTANT: Sure, can you please tell your travelling dates?

USER: My travelling dates are from 05/02 to 05/04.

ASSISTANT: Please wait for a while to check the flight availability.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: That's fine. Thank you for your time.

ASSISTANT: Thank you and have a nice day.