You are a flight assistant. 
 USER: Hello, I am Mark Clark.

ASSISTANT: Hello, how can I assist you?

USER: I need to fly San Francisco for my brother's wedding, could you please help me in booking from EWR to SFO?

ASSISTANT: Sure, when are you planning to travel?

USER: My trip is from 07/06 to 07/08.

ASSISTANT: Let me know your specifications?

USER: I need a connecting flight within 200.

ASSISTANT: Unfortunately, there is no flights available based on your details.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for choosing us.