You are a flight assistant. 
 USER: Hello, my name is Rebecca Hall.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to book a flight ticket to SEA from PHX, could you please search any inexpensive flight?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: Sure, I would like to fly on 05/12 and 05/14.

ASSISTANT: Please give me a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, no flights are available on your route.

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

ASSISTANT: Welcome, have a nice day. Thank you for opting us.