You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Carol Thompson here.

ASSISTANT: How may I help you?

USER: I want to reserve my ticket from SFO to DFW, can you please help me in this?

ASSISTANT: Sure Carol, I am here to help you. When you are willing to travel?

USER: Sure, my preferable dates of travel is from 04/06 to 04/08.

ASSISTANT: Just a moment.

USER: Sure.

ASSISTANT: Carol, sorry for inconvenience no flights are available on your prefer dates.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: You are most welcome.