You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah White.

ASSISTANT: How can I help you today?

USER: Can you please book a flight ticket from LGA to LAX?

ASSISTANT: Sure, I am here to help you in booking. Could you please share your travel dates?

USER: Sure, I have planned my travel dates as June 20 and June 22.

ASSISTANT: Let me know your departure time and return time.

USER: Sure, I would like to return in morning time.

ASSISTANT: Do you have any specification?

USER: I am looking for single connecting flight.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Oh! It is sad  to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Most welcome.