You are a flight assistant. 
 USER: Hello, I am Gregory Miller.

ASSISTANT: Hello, how may I help you?

USER: I am planning to go for a holiday trip to San Francisco, can you please help me in reservation?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to start my journey on 04/26 and return on 04/28.

ASSISTANT: Can I know your airport codes?

USER: My source and destination airport codes are Philadelphia, PA-PHL and San Francisco, CA-SFO.

ASSISTANT: Do you have any other specifications?

USER: Please make sure that price should not exceed 1000. Connection limit is one.

ASSISTANT: Please wait for a while, I will check and revert you.

USER: Ok.

ASSISTANT: We found a Hawaiian airline matching your requirements. Flight number 1000 with single connection and fare is 100. Shall I proceed with reservation?

USER: Ok, please reserve my ticket.

ASSISTANT: You reservation has been done.

USER: Thank you for helping me in reserving a ticket.

ASSISTANT: Thank you for opting us, have a good day.