You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need to reserve a flight ticket from PHX to IAD, can you please help me?

ASSISTANT: Sure, let me know your travel dates please?

USER: My planned travelling dates are Dec, 05 and 07 respectively.

ASSISTANT: May I know your connection limit?

USER: Flight has to be with single connection.

ASSISTANT: Do you need any other preference?

USER: I prefer to return at morning.

ASSISTANT: Can I know your name please to proceed further?

USER: Cynthia Miller here.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thanks for contacting us.