You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Carol Robinson here, I want to reserve my ticket from LGA to IAH, can you please help me?

ASSISTANT: Carol Robinson, I am here to help you for this. When would you like to travel?

USER: Sure, my planned dates of journey are from Apr, 25 to Apr, 27.

ASSISTANT: Do you have any airline preference?

USER: No, I need a depart time which is at evening.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

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

ASSISTANT: Thank you very much for approaching our agency.