You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Walker.

ASSISTANT: How may I aid you today?

USER: Can you help me in booking a ticket from DFW to EWR?

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

USER: My planning dates are from 05/26 to 05/28.

ASSISTANT: Ok, wait for a moment please.

USER: Ok.

ASSISTANT: Walker, sorry for the inconvenience, no flights as per your details. Thank you for reaching us.

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

ASSISTANT: It's my pleasure.