You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I be of your assistance today?

USER: On memorial day of my grand father I want to start my journey to San Francisco to meet my family.

ASSISTANT: Ok.

USER: So, I need your help in booking my flight ticket with a connecting flight.

ASSISTANT: Sure, our agency is always at our customer's service. May I know when are you planning to travel?

USER: I will fly on 05/29 and I intend to return on 05/31.

ASSISTANT: To proceed with easy booking, please help me in sharing your airport codes.

USER: My journey starts from ORD and return from SFO.

ASSISTANT: Ok. Could you mention your name please?

USER: Sure, You can book my flight ticket with my name Linda Smith.

ASSISTANT: Ok. Please hold on a minute, I will revert you with flight details.

USER: Sure.

ASSISTANT: Thanks for your patience, we hardly tried to provide you a flight. Unfortunately, we could not find flights on particular days of your journey.

USER: Ok, not a problem. I will go for other alternative.

ASSISTANT: Ok.

USER: Thank you for your kind service.

ASSISTANT: Thanks for opting our agency. Have a nice day!.