You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I am Laura Hall. Can you please do the airline reservation from MSP to IAD?

ASSISTANT: Sure, may I know your trip dates please?

USER: My journey dates are on Apr 20th and 22nd.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight. And my depart time should be in the morning.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, there is no flight available.

USER: Ok, no problem. Thank you.

ASSISTANT: My pleasure.