You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I am planning to travel to Seattle, so please help me to book a flight ticket.

ASSISTANT: Definitely, can you please inform your travel dates ?

USER: I want to travel on these dates 09/20 and 09/22.

ASSISTANT: Can you please inform your origin and destination airport codes?

USER: I want to travel from PHX to SEA.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you no flights available as per your requested dates. May I know your name for documentation purpose?

USER:  It's ok, thank you for the information. My name is Emma Collins.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.