You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: This is Linda Perez from New York.

ASSISTANT: Ok.

USER: I am planning to visit Comic con exhibition with my college friend's in Seattle, can you please book a flight ticket?

ASSISTANT: Sure, May I know your travelling dates?

USER: My depart is on Aug 12th and arrive on Aug 14th.

ASSISTANT: May I know your source airport code?

USER: My source code is LGA.

ASSISTANT: Do you have any connection limit?

USER: I am comfortable to travel with both the flights.

ASSISTANT: Is there any airline preference?

USER: Yes, I am looking for a normal-cost such as UA, AA, Delta and Hawaiian airlines.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.