You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Nancy Moore here, I want to reserve my ticket from LGA to OAK, can you please help me out?

ASSISTANT: Sure, I am here to help you. Can you please mention the dates of your journey?

USER: Sure, my planned dates of journey are from Apr, 30 to May, 02.

ASSISTANT: Is there any class preference?

USER: I am flexible with any class preference.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a depart and return time at morning.

ASSISTANT: Ok, please wait.

USER: Sure, I will wait.

ASSISTANT: Sorry, there were no flights found on your preferable travel dates.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for approaching us.