You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Anderson.

ASSISTANT: Joseph, how can I help you today?

USER: I don't know, how to book a flight from PHX to SEA. Can you help me with that?

ASSISTANT: Don't worry, I'll help you with that.

USER: Thank you.

ASSISTANT: Can I know the dates of travel?

USER: My travelling dates would be like 02/20 and 02/22. Did you find any flight?

ASSISTANT: Joseph, I didn't find any flight basing on your details.

USER: Oh! really sad. That's fine. Thank you for your support.

ASSISTANT: Thank you for contacting us.