You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from MSP to PHL. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know your name?

USER: I am Sarah Scott.

ASSISTANT: May I know your travelling dates?

USER: I want to travel in the flight on Mar 19 and Mar 21.

ASSISTANT: Do you need a single connecting flight?

USER: I want to travel in a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: I want to depart in morning time.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.