You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any assistance from us?

USER: Myself Jennifer Phillips. Can you please book a flight ticket from CLT to SFO locations?

ASSISTANT: Sure, I will definitely assist you. If you have any planned travelling dates, could you please tell us?

USER: My travelling dates are from 12/13 and 12/15.

ASSISTANT: Phillips, all flight tickets are sold out in your requested travelling dates. Do you have any other travelling dates?

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for consulting us, have a great day.