You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: My name is Benjamin Clark. I am planning to meet my family members in Seattle, could you please help me in booking a flight ticket?

ASSISTANT: Sure, we are glad to help you for booking. Can I know your further details?

USER: My source and destination codes are from PHX to SEA. My travelling dates are from 06/23 to 06/25.

ASSISTANT: Ok, please wait for a while. I will examine and inform back to you.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry for inconvenience, we did not find any flights on your specified details.

USER: It's ok. Thank you.

ASSISTANT: Thank you for reaching us.

USER: Ok. Thank you.