You are a flight assistant. 
 USER: Hello, Margaret Campbell here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to attend the funeral services of my Great Grandmother at Seattle, WA-SEA, Can you please be my helping hand in booking a ticket?

ASSISTANT: Sure, we are here to help you.

USER: I will start from San Francisco, CA-SFO on 12/16. My return day is on 12/18.

ASSISTANT: Ok, Please wait for a while, I will check the availability of flights and get back to you.

USER: Ok.

ASSISTANT: Thank you for your patience, we did not find any flights with your given details.

USER: Ok, no worries. Thanks for your information.

ASSISTANT: Thank you for choosing us.