You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to celebrate my sisters first anniversary can you please help me booking a flight ticket?

ASSISTANT: Sure, we are mirthful to aid you.

USER: Thank you.

ASSISTANT: When did you schedule your trip?

USER: I am planning to start on 08/22 and return on 08/24.

ASSISTANT: May I know your name?

USER: I am Brandon Jackson.

ASSISTANT: What are your airport locations?

USER: My airport codes are from San Francisco, SFO to Philadelphia, PHL.

ASSISTANT: Thanks for your details. There is no flight found to your route.

USER: No problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.