You are a flight assistant. 
 USER: Hello, I am Linda Allen.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket to Phoenix to attend my brother's wedding anniversary, please help me in booking from EWR to PHX?

ASSISTANT: Sure, please share me your travelling dates?

USER: My journey is from 09/26 to 09/28.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights with your specifications.

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

ASSISTANT: Thank you for reaching us.