You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Betty Martinez.

ASSISTANT: How may I assist you today?

USER: I just need your help in making my reservation from PHL to BOS.

ASSISTANT: Sure, I am here to help you, please share your travelling dates?

USER: Sure, my planned travelling dates are from 12/19 to 12/21.

ASSISTANT: Betty, no flights as per your details.

USER: It's ok, thank you for the information.

ASSISTANT: You are welcome.