You are a flight assistant. 
 USER: Hello. Amy Collins here.

ASSISTANT: Hello how may I assist you?

USER: I want to start my journey on 02/26 and return back on 02/28. Could you help me?

ASSISTANT: Amy Collins, may I know your desired travelling airport codes for this journey?

USER: My source airport code is LAX and destination airport code is LGA.

ASSISTANT: Ok, give me a moment to check with availability as per your requirements.

USER: Sure.

ASSISTANT: I'm so sorry to inform you but there is no flight available on your provided dates.

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

ASSISTANT: Thank you for consulting with our agency for your help. Have a great journey.