You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Donna Thomas. I have to visit Boston to meet my cousin, could you please help me to book a flight ticket from DFW to BOS?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Sure, my travelling dates are 01/11 and 01/13.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Ok, I will wait for your response.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.