You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Karen Martinez.

ASSISTANT: How can I assist you today?

USER: I want to book a flight ticket from AZ - PHX to CA - OAK. Please help me in booking a flight ticket.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travel dates are from 07/07 to 07/09.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Welcome, have a great day.