You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there for you?

USER: I am Michelle Lee from Seattle. I want to make a reservation from SEA to SFO to meet my parents. Can you please help me with the booking?

ASSISTANT: Sure, when are you planning to travel?

USER: Sure, my travelling dates are Mar 28 - Mar 30.

ASSISTANT: At what time would you like to depart and return?

USER: I want to return in the evening time.

ASSISTANT: How many connections do you need?

USER: I need a flight with single connection.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us.