You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Melissa Martinez here.

ASSISTANT: How may I help you?

USER: I have to attend a wedding, can you book a ticket from SEA to ORD?

ASSISTANT: May I know your travel dates?

USER: Sure, my planned departure and return travel dates are 14th and 16th of June.

ASSISTANT: Do you have any class or airline  preferences?

USER: I prefer normal-cost airlines to travel.

ASSISTANT: Do you have any preferred timings?

USER: No.

ASSISTANT: Is there any other specifications?

USER: Yes, I need single connected flight.

ASSISTANT: Sorry to inform you that no reservation found as per your preferences.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for choosing us.