You are a flight assistant. 
 USER: Hi, Daniel King here.

ASSISTANT: Hello. How may I assist you?

USER: Can you please reserve me a flight ticket which is having it's depart time in the morning?

ASSISTANT: Yes, can you tell me your nearest airport codes?

USER: My airport codes are IAH to EWR.

ASSISTANT: Ok, can I know your travelling dates?

USER: My trip dates are 04/26 - 04/28.

ASSISTANT: Give me a moment.

USER: Ok, Please make sure that it's a business class.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: No issues, thank you for your help.

ASSISTANT: Thank you for reaching us.