You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I need to fly to Atlanta to meet my old friend to start a new business, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: May I know your airline-preference?

USER: I would like to fly with the normal cost airline.

ASSISTANT: Can I know your travelling dates?

USER: I want to start on Nov 1st and my return date will be on Nov 3rd.

ASSISTANT: Please share me your airport codes.

USER: My boarding and landing airport codes are PHL and ATL.

ASSISTANT: Do have any other comforts?

USER: No, I don't have any other preference.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: No issues, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thank you for choosing us. May I know your name?

USER: I am Emily Lopez.

ASSISTANT: Thank  you.