You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Will you please help me with booking a flight ticket from LGA to SFO?

ASSISTANT: Can I know your travelling dates?

USER: My planned travel dates are from Aug 03 to Aug 05.

ASSISTANT: Do you prefer connecting flight or direct flight?

USER: I am looking for a connecting flight in my journey.

ASSISTANT: Is there any other preference?

USER: I need to book my ticket in economy class only.

ASSISTANT: Please let me know your name?

USER: Sure, myself Charles Martinez.

ASSISTANT: I regret, there is no flight for your travelling dates.

USER: That's ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for the information.