You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Sharon Wilson. Can you help me to book a flight on 04/17 and 04/19?

ASSISTANT: Sure, could you please provide your codes of airport you want to travel?

USER: My source and destination airport codes are MSP and LAX.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flights were available on your dates.

USER: Ok, no issues.

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

USER: Thank you for your time.