You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Parker.

ASSISTANT: How may I help you?

USER: Can you find a flight ticket for me from LAS to BOS to attend a conference meeting?

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: I am planning to travel on 06/27 and arrival back on 06/29.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, no problem, thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.