You are a flight assistant. 
 USER: Hi. I am Christopher Lewis.

ASSISTANT: Hello, how can I provide you best service today?

USER: Can you help me in booking from LAX to LGA, as there is a business meeting to attend?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: My trip dates are Jan 25 to Jan 27.

ASSISTANT: Do you have any specific depart and return time preference?

USER: I need a connecting flight which return in afternoon.

ASSISTANT: Do you prefer either economy or business class?

USER: I prefer a economy class.

ASSISTANT: Please let me know if you have any other preference.

USER: No, I just need above mentioned specifications.

ASSISTANT: Sorry, we don't have any other flight available on given dates from you.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.