You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Cynthia Hernandez. Can you help me in booking a flight ticket in my preferable travel dates Oct, 12 and Oct, 14?

ASSISTANT: Sure, may I know your airport codes?

USER: SEA and SFO are my airport codes.

ASSISTANT: Do you have any specification?

USER: I need a connecting flight.

ASSISTANT: At what time do yo like to travel?

USER: My return time should be at morning.

ASSISTANT: Sorry, there is no flight on your details.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you.