You are a flight assistant. 
 USER: Hello. I am Amanda Harris.

ASSISTANT: Hello, how may I help you?

USER: Can you please reserve me a flight ticket in normal cost airline to go for  holiday trip?

ASSISTANT: Yes, I will help you. Please let me know your travel dates.

USER: I am planning to depart on May 19 and return on May 21.

ASSISTANT: Ok, please provide me your source and destination airport codes.

USER: I wish to board from HOU to reach IAH.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, please let me know your specifications.

USER: My depart time should be in the morning  and return should be in the afternoon time.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: It's ok,  no problem. Thank you for your information.

ASSISTANT: You are welcome and have a nice day.