You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Anthony Lopez. I need to attend a conference meeting in Phoenix so please help me with flight ticket booking from Seattle.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Thank you. I have planned to travel on dates of Apr 26 and Apr 28.

ASSISTANT: May I know your airport codes?

USER: Sure, I would like to travel from SEA to PHX.

ASSISTANT: Do you have any requirements?

USER: Yes, I am looking for normal cost airlines.

ASSISTANT: Sorry there is no flight available for you.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.