You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you today?

USER: I am planning to book a flight ticket to SFO from DFW, can you please help me out?

ASSISTANT: Sure, when do you want to start and return on?

USER: Sure, my planned travelling dates are Jan 19 and Jan 21.

ASSISTANT: Do you need a connecting flight?

USER: I am looking for a flight with 1 connection.

ASSISTANT: Do you have any other specifications?

USER: No more specifications.

ASSISTANT: Can I know your good name?

USER: Sure, my name is Emma Perez.

ASSISTANT: Thank you for your details, there are no flights found with given details.

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

ASSISTANT: Thank you.